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Visual Acuity Test
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Dr. Aditya Raut M.B.B.S D.O.MS
Updated on Mar 08  •  2 mins read

Table of contents

What is Visual Acuity Test
When to do Visual Acuity Test
Diseases in which Visual Acuity Test is done
Symptoms that require Visual Acuity Test
How Visual Acuity Test is done
How long will Visual Acuity Test take
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What is Visual Acuity Test

Visual Acuity Test is a type of vision test used to measure how well someone can see.It typically involves reading letters of various sizes from a distance in order to determine how well a person can distinguish them.

Visual Acuity Test is used to diagnose vision problems such as nearsightedness, farsightedness, and astigmatism.It can also be used to detect changes in vision that could indicate a more serious eye condition.

The test is performed by an eye doctor or optometrist, who will ask the patient to read letters of various sizes from a chart or a digital device.The results are measured using a unit of measurement known as the “Decimal Visual Acuity Scale.”

Normal vision is usually considered to be 20/20, meaning that the patient can read letters from 20 feet away that are the size of a standard eye chart.

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When to do Visual Acuity Test

  1. The Visual Acuity Test should be done in all adult patients, especially those with a known history of vision loss or eye disease. It should also be done in children prior to starting school and any time there is a concern about vision. It should also be done in any person with a new onset of eye symptoms, such as sudden blurring or double vision.
  2. When to consult a doctor urgently for Visual Acuity Test:
  3. -If you experience a sudden decrease in vision in one or both eyes.
  4. -If you experience blurriness, double vision, or blind spots.
  5. -If you experience pain, redness, or swelling of the eye(s).
  6. -If you experience flashes of light or floaters in the vision.
  7. -If you experience a sudden onset of severe headaches.
  8. -If you experience vision loss after a head injury.
  9. -If you experience decreased vision in one or both eyes due to a medical condition.
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Diseases in which Visual Acuity Test is done

  1. Glaucoma: The Visual Acuity Test helps to measure the vision of a person and determine if they have any loss of vision, which is a common symptom of glaucoma.
  2. Cataracts: The Visual Acuity Test can help to detect any clouding of the lens of the eye, which is a common symptom of cataracts.
  3. Diabetic Retinopathy: The Visual Acuity Test can help to detect any vision changes due to the damage to the retina which is caused by diabetic retinopathy.
  4. Macular Degeneration: The Visual Acuity Test can help to detect any loss of central vision which is a symptom of macular degeneration.
  5. Retinitis Pigmentosa: The Visual Acuity Test can help to detect any night blindness or tunnel vision which are symptoms of retinitis pigmentosa.
  6. Keratoconus: The Visual Acuity Test can help to detect any blurred vision or double vision which are symptoms of keratoconus.
  7. Amblyopia: The Visual Acuity Test can help to detect any reduced vision or decreased visual acuity in one eye which are symptoms of amblyopia.
  8. Strabismus: The Visual Acuity Test can help to detect any eye misalignment which is a symptom of strabismus.
  9. Uveitis: The Visual Acuity Test can help to detect any vision changes which are a symptom of uveitis.
  10. Optic Neuritis: The Visual Acuity Test can help to detect any vision changes or vision loss which are symptoms of optic neuritis.
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Symptoms that require Visual Acuity Test

  1. Blurry or double vision: You may notice that your vision is not as sharp as it used to be and may find it difficult to read small print or clearly see distant objects.
  2. Difficulty focusing: You may have difficulty focusing your eyes on objects that are moving or that are far away.
  3. Eye strain: You may feel like your eyes are becoming tired after a short period of time and may have difficulty concentrating on tasks.
  4. Headaches: You may experience headaches or a feeling of pressure behind your eyes after focusing on a task for a prolonged period of time.
  5. Eye pain: You may feel a constant ache or sharp pain behind or around your eyes.
  6. Poor night vision: You may have difficulty seeing clearly in the dark and may find yourself squinting or straining to make out objects in dim light.
  7. Sensitivity to light: You may find yourself blinking or squinting when exposed to bright lights.
  8. Seeing flashes of light or floaters: You may see flashes of light or dark spots that drift across your vision.
  9. Dry eyes: You may find your eyes are often feeling dry, itchy, and irritated.
  10. Excessive tearing: You may find your eyes are constantly tearing up and you may have difficulty keeping them open for long periods of time.
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How Visual Acuity Test is done

  1. The Visual Acuity Test is a quick and easy way to measure your vision. With fully automated equipment, the process is even simpler.
  2. First, you will be asked to sit in front of the machine. You will then be asked to put on a pair of goggles that will be used to measure your vision. The machine will then present you with a series of letters or symbols on a computer screen. Your job is to identify each letter or symbol as accurately as possible.
  3. Once you have completed the test, the machine will calculate your visual acuity score. This score is an indication of how well you can see. If your score is lower than normal, your doctor may suggest making changes to your eyeglass prescription or may recommend further testing.
  4. The Visual Acuity Test is a very fast and easy way to check your vision. With automated equipment, it is even simpler.
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How long will Visual Acuity Test take

  1. .
  2. I understand that you would like to know how long the Visual Acuity Test will take and how soon you will receive the results. The test itself will typically take about 10 minutes. After the test is completed, I will need to review the results and compile a report. This usually takes about 48-72 hours. Once I have reviewed your results, I will then be able to provide you with a full report. If you have any further questions, please do not hesitate to contact me.
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Reviewed By

Dr.Aditya Raut, MBBS, DOMS, Cataract and Refractive Surgeon, with experience of over 3000 cataract surgeries.
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Article Reviewed by Dr. Aditya Raut M.B.B.S D.O.MS Cataract Lasik and refractive surgeon
Specialist in number reduction surgery, Refractive Lens exchange and ICL surgery.
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